String length()

The length() method in java is a part of the String class and is used to retrieve the number of characters in a string. It returns an integer value representing the length of the string.

The basic syntax of the length() method is as follows:

int length()

Here’s how you can use it:

String str = "Hello, world!";
int len = str.length(); // 13

In this example, the length() method is called on the string "Hello, world!", and it returns the value 13, which is the number of characters in the string.

Key points to note:

• The length() method returns the number of characters in the string, including letters, digits, spaces, punctuation, and any other Unicode characters.
• The method doesn’t require parentheses because it’s a method, not a field or a property.
• The length of the string is 0 for an empty string ("").

Here are a few more examples:

String empty = "";
int emptyLength = empty.length(); // 0

String digits = "12345";
int digitsLength = digits.length(); // 5

String stringWithSpaces = "    Spaces     ";
int stringWithSpacesLength = stringWithSpaces.length(); // 15

In the above examples, emptyLength is 0 because the empty string has no characters. digitsLength is 5 because the string “12345” contains five digits. stringWithSpacesLength is 15 because the string ” Spaces ” has 15 characters, including the spaces.